Re: [math-fun] Yet another zeta 2 proof

I'm pretty sure the solution to the Basel problem in this link is the same proof that someone presented to the Berkeley Math Circle some time between 3 and 5 years ago. I don't remember who it was that presented the proof. —Dan

On Nov 9, 2015, at 10:16 AM, Bill Gosper <billgosper@gmail.com> wrote:

Young eavesdropper Zack sent me http://mathcircle.berkeley.edu/archivedocs/2009_2010/lectures/0910lecturespd... a weird proof based on

(X,Y) = (log(sin(x+y)/sin(x)), log(sin(x+y)/sin(y))

being (to me, remarkably) area-preserving. I think the paper needs a picture of this. gosper.org/passare3.png --rwg

Unfortunately, the paper perpetuates the old, unslick proof that Harmonic#(oo) = oo.